Purification device suitable for gas chromatography sniffing instrument

Abstract

The utility model discloses a purification device suitable for a gas chromatography sniffing instrument, which comprises a main body (1), one end of the main body (1) is fixedly provided with a rectangular frame body (2), an adjusting plate (3) is slidably mounted in the rectangular frame body (2), the bottom of the adjusting plate (3) is provided with a first gas cleaning assembly and a second gas cleaning assembly, and the first gas cleaning assembly and the second gas cleaning assembly are fixedly connected with the main body (1). A gas inlet pipe (4) is fixedly arranged on the side wall of the rectangular frame (2), a gas outlet pipe (5) is fixedly arranged at the end of the main body (1), a third gas cleaning assembly is arranged at the bottom of the main body (1), a gas inlet channel (6) and a gas outlet channel (7) which are connected with the third gas cleaning assembly are arranged in the main body (1), and the gas inlet pipe (4) and the gas inlet channel (6) are coaxial. According to the gas chromatograph sniffing device, sniffing distortion caused by odor residues, odor cross interference and the like generated during gas sniffing can be effectively eliminated, and the accuracy of a gas chromatograph sniffing test result is improved.

Description

Technical Field

[0001] The utility model relates to a gas purification device, in particular to a purification device suitable for a gas chromatograph olfactometer. Background Art

[0002] Olfactory Detector Port (ODP), also known as olfactometer, is a device that uses the sensitive human olfactory organ to detect the smell of aroma substances. It is usually used in conjunction with a gas chromatograph. A gas chromatograph can separate and analyze volatile and semi-volatile aroma substances. While using conventional flame ionization detectors and mass spectrometers to test the content of substances, an olfactory detector can be installed in parallel to obtain information not only on the type and quantity of the substance being studied, but also another subjective but persuasive impression, category and intensity of the human sense of smell.

[0003] In actual work, when the olfactometer smells aromatic substances, the human nose is too sensitive, and the phenomenon of aroma residue often occurs. That is, after the substance with strong aroma leaves the peak from the gas chromatograph, its smell remains in the olfactory pipeline for too long, so that it masks the smell of subsequent substances, causing olfactory distortion, which in serious cases affects the accuracy of the olfactometer. There is currently no good solution to this problem. Utility Model Content

[0004] The purpose of the utility model is to provide a purification device suitable for a gas chromatography olfactometer to solve the technical problems in the prior art. It can effectively eliminate odor residues generated when smelling gas, odor cross-interference and other reasons causing olfactory distortion, and improve the accuracy of gas chromatography olfaction test results.

[0005] The utility model provides a purification device suitable for a gas chromatograph olfactometer, comprising a main body, one end of the main body is fixedly provided with a rectangular frame, an adjustment plate is slidably installed in the rectangular frame, a first gas cleaning component and a second gas cleaning component are provided at the bottom of the adjustment plate, an air inlet pipe is fixedly provided on the side wall of the rectangular frame, an air outlet pipe is fixedly provided at the end of the main body, a third gas cleaning component is provided at the bottom of the main body, an air inlet duct and an air outlet duct connected to the third gas cleaning component are provided in the main body, and the air inlet pipe is coaxial with the air inlet duct.

[0006] In the aforementioned purification device suitable for gas chromatography olfactometer, preferably, a slide groove is opened on the inner wall of the rectangular frame, the adjustment plate is slidably connected to the slide groove, and a lever is fixed on the top surface of the adjustment plate.

[0007] In the aforementioned purification device suitable for a gas chromatograph olfactometer, preferably, the structures of the first gas cleaning assembly and the second gas cleaning assembly are exactly the same, both of which include a mounting column, a first solution bottle and a first solution bottle connecting pipe, the top of the mounting column is fixedly connected to the bottom surface of the adjusting plate, the lower end of the mounting column is formed with a first mounting groove, the inner wall of the first mounting groove is formed with a thread, the bottle mouth of the first solution bottle is threadedly connected to the first mounting groove, an air inlet and an air outlet are formed in the mounting column, the air inlet of the air inlet and the air outlet of the air outlet are both located on the side wall of the mounting column, and the air inlet of the air inlet and the air outlet of the air outlet are both coaxial with the air inlet pipe, the air outlet of the air inlet and the air inlet of the air outlet are both connected to the first mounting groove, and the upper end of the first solution bottle connecting pipe is fixedly arranged in the first mounting groove and connected to the air outlet of the air inlet.

[0008] In the aforementioned purification device suitable for a gas chromatograph olfactometer, preferably, a sealing ring is fixedly provided in the mounting groove.

[0009] In the aforementioned purification device suitable for gas chromatograph olfactometer, preferably, a first rubber connecting tube and a second rubber connecting tube are fixedly provided on the inner wall of the rectangular frame, one end of the first rubber connecting tube is connected to the air inlet pipe, and one end of the second rubber connecting tube is connected to the air inlet duct.

[0010] In the aforementioned purification device suitable for a gas chromatograph olfactometer, preferably, the third gas cleaning component includes a second solution bottle and a second solution bottle connecting tube, a second mounting groove with a thread is provided at the bottom of the main body, the air outlet end of the air inlet duct and the air inlet end of the air outlet duct are both connected to the second mounting groove, the upper end of the second solution bottle connecting tube is fixed in the second mounting groove and connected to the air outlet end of the air inlet duct, and the second solution bottle is threadedly connected to the second mounting groove.

[0011] In the aforementioned purification device suitable for a gas chromatograph olfactometer, preferably, the air inlet pipe is connected to the gas chromatograph, and the air outlet pipe is connected to the olfactometer.

[0012] Compared with the prior art, the utility model includes a main body, a rectangular frame is fixedly provided at one end of the main body, an adjustment plate is slidably installed in the rectangular frame, a first gas cleaning assembly and a second gas cleaning assembly are provided at the bottom of the adjustment plate, an air inlet pipe is fixedly provided on the side wall of the rectangular frame, an air outlet pipe is fixedly provided at the end of the main body, a third gas cleaning assembly is provided at the bottom of the main body, an air inlet duct and an air outlet duct connected to the third gas cleaning assembly are provided in the main body, and the air inlet pipe is coaxial with the air inlet duct. The utility model can remove the odor of the gas coming out of the gas chromatograph in a targeted manner according to actual needs by providing the first gas cleaning assembly, the second gas cleaning assembly and the third gas cleaning assembly, and effectively solve the problem of olfactory distortion and affecting the accuracy of the olfactometer. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an axonometric drawing of the utility model;

[0014] Figure 2 It is an exploded view of the utility model;

[0015] Figure 3 is a cross-sectional view of the mounting column;

[0016] Figure 4 It is a cross-sectional view of the main body and the rectangular frame.

[0017] Explanation of the reference numerals: main body 1, rectangular frame 2, adjustment plate 3, air inlet pipe 4, air outlet pipe 5, air inlet duct 6, air outlet duct 7, slide groove 8, lever 9, mounting column 10, first solution bottle 11, first solution bottle connecting tube 12, first mounting groove 13, air inlet hole 14, air outlet hole 15, first rubber connecting tube 16, second rubber connecting tube 17, second solution bottle 18, second solution bottle connecting tube 19, second mounting groove 20, supporting leg 21. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0019] Embodiments of the present utility model: Figure 1-Figure 4As shown, a purification device suitable for a gas chromatograph olfactometer comprises a main body 1, which is a rectangular parallelepiped structure. A rectangular frame 2 is fixedly provided at one end of the main body 1, an adjusting plate 3 is slidably installed in the rectangular frame 2, a first gas cleaning assembly and a second gas cleaning assembly are provided at the bottom of the adjusting plate 3, an air inlet pipe 4 is fixedly provided on the side wall of the rectangular frame 2, an air outlet pipe 5 is fixedly provided at the end of the main body 1, a third gas cleaning assembly is provided at the bottom of the main body 1, an air inlet duct 6 and an air outlet duct 7 connected to the third gas cleaning assembly are provided in the main body 1, and the air inlet pipe 4 is coaxial with the air inlet duct 6.

[0020] In this embodiment, the main body 1 and the rectangular frame 2 are arranged vertically, and the two form a "T" shape. The function of the adjustment plate 3 is to adjust one of the first gas cleaning component and the second gas cleaning component to be connected with the air inlet pipe 4 and the air inlet duct 6, thereby changing the cleaning function. When in use, different solutions are loaded into the first gas cleaning component and the second gas cleaning component. For example, 0.1% hydrochloric acid (HCl) solution is loaded into the first gas cleaning component, and 0.1% sodium hydroxide (NaOH) solution is loaded into the second gas cleaning component. The first gas cleaning component can wash away alkaline and odorous gases, and the second gas cleaning component can wash away acidic and irritating gases. Thereby achieving the function of removing odors.

[0021] In a specific embodiment, a slide groove 8 is opened on the inner wall of the two long side walls of the rectangular frame 2, the two slide grooves 8 are arranged oppositely and parallel, the two long sides of the adjustment plate 3 are slidably connected to the slide groove 8, and a lever 9 is fixed on the top surface of the adjustment plate 3.

[0022] In this embodiment, the length of the chute 8 is preferably limited, so that when the adjustment plate 3 moves to one end of the chute 8, the first gas cleaning group is just connected to the air intake pipe 4 and the air intake duct 6, and when the adjustment plate 3 moves to the other end of the chute 8, the second gas cleaning group is just connected to the air intake pipe 4 and the air intake duct 6. The function of the lever 9 is to facilitate the movement of the adjustment plate 3.

[0023] Further, the structures of the first gas cleaning assembly and the second gas cleaning assembly are completely the same, both of which include a mounting column 10, a first solution bottle 11 and a first solution bottle connecting pipe 12. The top of the mounting column 10 is fixedly connected to the bottom surface of the adjustment plate 3. The lower end of the mounting column 10 is formed with a first mounting groove 13. The inner wall of the first mounting groove 13 is formed with a thread. The bottle mouth of the first solution bottle 11 is threadedly connected to the first mounting groove 13. An air inlet 14 and an air outlet 15 are formed in the mounting column 10. The air inlet of the air inlet 14 and the air outlet of the air outlet 15 are both located on the side wall of the mounting column 10. The air inlet of the air inlet 14 and the air outlet of the air outlet 15 are both coaxial with the air inlet pipe 4. The air outlet of the air inlet 14 and the air inlet of the air outlet 15 are both connected to the first mounting groove 13. The upper end of the first solution bottle connecting pipe 12 is fixed in the first mounting groove 13 and connected to the air outlet of the air inlet 14. A sealing ring is fixed in the mounting groove 13.

[0024] Preferably, a first rubber connecting tube 16 and a second rubber connecting tube 17 are fixedly provided on the inner wall of the rectangular frame 2 , one end of the first rubber connecting tube 16 is connected to the air intake pipe 4 , and one end of the second rubber connecting tube 17 is connected to the air intake duct 6 .

[0025] In this embodiment, the air inlet pipe 4, the first rubber connecting pipe 16, the air inlet of the air inlet hole 14, the air outlet of the air outlet hole 15, the second rubber connecting pipe 17, the air inlet passage 6 and the air outlet passage 7 are all arranged on a straight line.

[0026] By providing the first rubber connecting tube 16 and the second rubber connecting tube 17 , when the mounting column 10 is moved between the first rubber connecting tube 16 and the second rubber connecting tube 17 , the first rubber connecting tube 16 can be effectively connected to the air inlet 14 , and the second rubber connecting tube 17 can be effectively connected to the air outlet 15 , thereby effectively preventing air leakage.

[0027] Further, the third gas cleaning assembly includes a second solution bottle 18 and a second solution bottle connecting pipe 19, a second threaded mounting groove 20 is provided at the bottom of the main body 1, the outlet end of the air inlet 6 and the air inlet end of the air outlet 7 are both connected to the second mounting groove 20, the upper end of the second solution bottle connecting pipe 19 is fixed in the second mounting groove 20 and connected to the outlet end of the air inlet 6, and the second solution bottle 18 is threadedly connected to the second mounting groove 20. The air inlet pipe 4 is connected to the gas chromatograph, and the air outlet pipe 5 is connected to the olfactometer.

[0028] The second solution bottle 18 is mainly used to contain water, which can further clean and buffer the gas.

[0029] The working principle of the utility model is as follows: when working, the air inlet pipe 4 is connected to the gas chromatograph, and the air outlet pipe 5 is connected to the olfactometer. The first solution bottle 11 in the first gas cleaning component is filled with 0.1% hydrochloric acid HCl solution, the first solution bottle 11 in the second gas cleaning component is filled with 0.1% sodium hydroxide solution, and the second solution bottle 18 in the third gas cleaning component is filled with water, and they are installed. The adjustment plate 3 is moved according to the odor to be removed. When the acidic odor in the gas needs to be removed, the adjustment plate 3 is moved by the lever 9 to move the second gas cleaning component between the first rubber connecting tube 16 and the second rubber connecting tube 17, so that the air inlet 14 in the second gas cleaning component is connected to the first rubber connecting tube 16, and the air outlet 15 is connected to the second rubber connecting tube 17. Similarly, if the alkaline odor in the gas needs to be removed, the adjustment plate 3 is moved to move the first gas cleaning component between the first rubber connecting tube 16 and the second rubber connecting tube 17.

[0030] After adjustment, the gas with a strong aroma is sent from the gas chromatograph to the air inlet pipe 4, then enters the air inlet hole 14 through the first rubber connecting pipe 16, and enters the first solution bottle 11 along the first solution bottle connecting pipe 12, and contacts with the solution in the first solution bottle 11 to produce a chemical reaction, thereby removing acidic gas or alkaline gas. The cleaned gas enters the second solution bottle 18 through the air outlet 15, the second rubber connecting pipe 17, the air inlet 6, the second solution bottle connecting pipe 19 in sequence, is cleaned twice by the water in the second solution bottle 18, and then is sent to the olfactometer through the air outlet 7 and the air outlet pipe 5, thereby ensuring the detection accuracy of the olfactometer.

[0031] The above describes in detail the structure, features and effects of the utility model based on the embodiments shown in the drawings. The above is only a preferred embodiment of the utility model, but the utility model is not limited to the scope of implementation shown in the drawings. Any changes made in accordance with the concept of the utility model, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and the drawings, should be within the protection scope of the utility model.

Claims

1. A purification device suitable for a gas chromatograph olfactometer, comprising a main body (1), characterized in that: A rectangular frame (2) is fixedly provided at one end of the main body (1), an adjustment plate (3) is slidably installed in the rectangular frame (2), a first gas cleaning assembly and a second gas cleaning assembly are provided at the bottom of the adjustment plate (3), an air inlet pipe (4) is fixedly provided on the side wall of the rectangular frame (2), an air outlet pipe (5) is fixedly provided at the end of the main body (1), a third gas cleaning assembly is provided at the bottom of the main body (1), an air inlet duct (6) and an air outlet duct (7) connected to the third gas cleaning assembly are provided in the main body (1), and the air inlet pipe (4) is coaxial with the air inlet duct (6).

2. The purification device for gas chromatography olfactometer according to claim 1, characterized in that: A sliding groove (8) is provided on the inner wall of the rectangular frame (2), the adjustment plate (3) is slidably connected to the sliding groove (8), and a lever (9) is fixedly provided on the top surface of the adjustment plate (3).

3. The purification device for gas chromatography olfactometer according to claim 2, characterized in that: The structures of the first gas cleaning assembly and the second gas cleaning assembly are completely the same. Both of them include a mounting column (10), a first solution bottle (11) and a first solution bottle connecting pipe (12). The top end of the mounting column (10) is fixedly connected to the bottom surface of the adjustment plate (3). The lower end of the mounting column (10) is formed with a first mounting groove (13). The inner wall of the first mounting groove (13) is formed with a thread. The bottle mouth of the first solution bottle (11) is threadedly connected to the first mounting groove (13). The mounting column (10) is formed with an air inlet hole (13). 4) and an air outlet (15), the air inlet of the air inlet hole (14) and the air outlet of the air outlet (15) are both located on the side wall of the mounting column (10), and the air inlet of the air inlet hole (14) and the air outlet of the air outlet (15) are both coaxial with the air inlet pipe (4), the air outlet of the air inlet hole (14) and the air inlet of the air outlet (15) are both connected to the first mounting groove (13), and the upper end of the first solution bottle connecting tube (12) is fixed in the first mounting groove (13) and is connected to the air outlet of the air inlet hole (14).

4. The purification device for gas chromatography olfactometer according to claim 3, characterized in that: A sealing ring is fixedly arranged in the installation groove (13).

5. The purification device for gas chromatography olfactometer according to claim 3, characterized in that: A first rubber connecting tube (16) and a second rubber connecting tube (17) are fixedly provided on the inner wall of the rectangular frame (2); one end of the first rubber connecting tube (16) is connected to the air intake pipe (4), and one end of the second rubber connecting tube (17) is connected to the air intake passage (6).

6. The purification device for gas chromatography olfactometer according to claim 5, characterized in that: The third gas cleaning component comprises a second solution bottle (18) and a second solution bottle connecting pipe (19); a second mounting groove (20) with a thread is provided at the bottom of the main body (1); the outlet end of the air inlet duct (6) and the air inlet end of the air outlet duct (7) are both connected to the second mounting groove (20); the upper end of the second solution bottle connecting pipe (19) is fixed in the second mounting groove (20) and is connected to the outlet end of the air inlet duct (6); the second solution bottle (18) is threadedly connected to the second mounting groove (20).

7. The purification device for gas chromatography olfactometer according to claim 6, characterized in that: The air inlet pipe (4) is connected to a gas chromatograph, and the air outlet pipe (5) is connected to an olfactometer.

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